A long and branched animal cell is :
(a) Why are nerve cells long and have branches ? (b) What is the other name of a nerve cell ?
The human body contains a large number of cells A which are very long and branched, and look like electric wires. The longest branch of this cell is B whereas there are many small branches C. Any two A cells do not join to one another completely in the human body. There is a microscopic gap D between every pair of adjacent A cells through which electric impulses can pass by the release of a chemical substance.
(a) What are cells A ?
(b) What is the name of (i) branch B, and (ii) branches C ?
(c) What is the microscopic gap D is known as ?
(d) What is the function of cells like A in the human body ?
(e) The cells A are of three types. Name the three types.